US6832690B2 - Guiding device for a flotation machine - Google Patents

Guiding device for a flotation machine Download PDF

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Publication number
US6832690B2
US6832690B2 US10/293,413 US29341303A US6832690B2 US 6832690 B2 US6832690 B2 US 6832690B2 US 29341303 A US29341303 A US 29341303A US 6832690 B2 US6832690 B2 US 6832690B2
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US
United States
Prior art keywords
gas
guiding device
flotation
dispersion mechanism
cell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US10/293,413
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English (en)
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US20040129621A1 (en
Inventor
Christian Kujawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Outokumpu Oyj
Original Assignee
Outokumpu Oyj
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Outokumpu Oyj filed Critical Outokumpu Oyj
Priority to US10/293,413 priority Critical patent/US6832690B2/en
Assigned to OUTOKUMPU OYJ reassignment OUTOKUMPU OYJ ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KUJAWA, CHRISTIAN
Priority to EA200500685A priority patent/EA007279B1/ru
Priority to PCT/FI2003/000842 priority patent/WO2004060565A1/fr
Priority to MXPA05007280A priority patent/MXPA05007280A/es
Priority to BRPI0317899-4B1A priority patent/BR0317899B1/pt
Priority to AU2003276309A priority patent/AU2003276309B2/en
Priority to CA2512135A priority patent/CA2512135C/fr
Priority to GB0510427A priority patent/GB2410453B/en
Priority to CNB2003801050031A priority patent/CN1313212C/zh
Priority to ARP030104160A priority patent/AR042028A1/es
Publication of US20040129621A1 publication Critical patent/US20040129621A1/en
Publication of US6832690B2 publication Critical patent/US6832690B2/en
Application granted granted Critical
Priority to SE0501222A priority patent/SE528208C2/sv
Priority to ZA200504796A priority patent/ZA200504796B/en
Priority to FI20050693A priority patent/FI121263B/fi
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/16—Flotation machines with impellers; Subaeration machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • B03D1/1412—Flotation machines with baffles, e.g. at the wall for redirecting settling solids
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/24—Treatment of water, waste water, or sewage by flotation

Definitions

  • the invention relates to a flotation machine which consists of a flotation cell having a means for feeding slurry in the flotation cell, a gas dispersion mechanism for feeding gas into the slurry and producing froth, a means for removing froth from the flotation cell and a means for removing tailings from the flotation cell.
  • a flotation machine which consists of a flotation cell having a means for feeding slurry in the flotation cell, a gas dispersion mechanism for feeding gas into the slurry and producing froth, a means for removing froth from the flotation cell and a means for removing tailings from the flotation cell.
  • a froth flotation machine for recovering valuable mineral material normally with some hydrophobic surface, normally comprises a flotation cell in the form of a tank having an inlet in the cell wall for feeding slurry to be floated as well as an outlet for tailings in the lower part of the cell.
  • Flotation cells may be single mixing vessels, in series or in parallel. They may be either rectangular or cylindrical in shape, in horizontal or upright position.
  • Gas is supplied by some method to the gas dispersion mechanism, either through the hollow rotating shaft to the gas dispersion mechanism or by some independent supply line. The dispersion mechanism causes low pressure zones as well as high pressure zones as it rotates.
  • the slurry in the flotation machine is mixed with the separately supplied gas, creating gas bubbles, which are discharged and dispersed into the whole space of the flotation cell.
  • stationary baffles are installed around the gas dispersion mechanism to promote gas dispersion and attenuate the rotation of the slurry in the flotation cell.
  • the valuable hydrophobic material in the cell attaches preferentially to the gas bubbles and rise to the surface of the cell, forming a froth layer and overflowing out of the cell into the froth launders.
  • a rotor of which has a plurality of vertical oriented plates, which form the pumping chambers. Air is pumped to each chamber via a vertical downcomer, which also incorporates and supports a horizontal shroud directly above the rotor. This shroud also supports the vertical stator blades. While the slurry flow entering the rotor is initially deflected upwards as it exits the rotor pumping slots it is deflected horizontally by the overhung shroud and is pumped radially outwards through the stator blades.
  • a significant zone of turbulence is created by the high velocity flows exiting the gas dispersion mechanism. This is the most important region within the flotation device for it is in this region that particle suspension, gas dispersion and gas bubble and particle contact takes place. If the flotation mechanism fails to properly disperse the gas into fine bubbles or contacts the gas bubbles with particles throughout the cell or if the solids suspension is inadequate then the flotation process suffers and the overall recovery of the desired material will be less.
  • the dispersion of gas by mechanical agitation which creates negative pressure zone at the intake and positive pressure zone at the discharge, it is possible that gas, which has been supplied by some means to the gas dispersion mechanism short-circuits from the positive pressure zone back to the negative pressure zone occurs.
  • the object of the present invention is to eliminate the internal gas re-circulation existing, eliminate the drawbacks of the prior art, and to enhance the operation of flotation machine by preventing the gas dispersed by gas dispersion mechanism to flow back into the suction zone of the gas dispersion mechanism.
  • the device of the invention advantageously separates the input and output pressure zones of the gas dispersion mechanism and thus prevents gas re-circulation within the gas dispersion mechanism.
  • the guiding device By placing the guiding device between the pressure zone and suction zone of the gas dispersion mechanism, it guides the gas away and because of the natural buoyancy of the gas also upwards in the flotation machine, out of the reach of the rotor suction zone.
  • the guiding device is placed advantageously so, that the return flow of the pulp is not disturbed.
  • the size of the guiding device can be advantageously dimensioned so, that it matches with the flotation cell size, rotor size, gas dispersion mechanism design, different pulp viscosities and densities and other flotation parameters.
  • the guiding device is arranged to extend essentially symmetrically around at least part of the gas dispersion mechanism.
  • the guiding device is arranged to extend essentially symmetrically around the whole gas dispersion mechanism. Then it guides all of the gas dispersed around the gas dispersion mechanism upwards in the cell.
  • the upper edge of the guiding device is located more near to the cell wall than the lower edge, which promotes the gas flow into right direction and leaves more space in the lower part of the cell.
  • the upward pulp flow in the flotation machine aids the upward gas flow and therefore further improves the operation of flotation process.
  • the guiding device is easy to install and for example could be attached to the flotation machine by at least one fastening element like bolt.
  • FIG. 1 Guiding device in the flotation cell
  • FIG. 2 Three-dimensional view of the guiding device
  • a flotation machine 1 includes at least a flotation cell 2 having a means for feeding slurry in the flotation cell, a gas dispersion mechanism 3 for feeding gas 5 into the slurry and producing froth, a means for removing froth from the flotation cell and a means for removing tailings from the flotation cell. Also according to the invention there is arranged at least one guiding device 4 near the gas dispersion mechanism 3 in order to guide the dispersed gas away from the gas dispersion mechanism to prevent the recirculation of the flotation gas into the suction zone 7 of the gas dispersion mechanism 3 .
  • the guiding device 4 is arranged near the gas dispersion mechanism so that it guides the gas 5 away from the mechanism.
  • the guiding device according to this example is cone-shaped, consisting of one wall element 10 , which is directed upwards in the cell extending essentially symmetrically around the whole gas dispersion mechanism 3 .
  • the guiding device according to this example is made of light and wear resistant material.
  • the guiding device 4 is arranged at the place between the pressure zone 6 and suction zone 7 , like at neutral pressure zone between the inlet and outlet of the gas dispersion mechanism 3 in order to guide the immersed gas away from the suction zone 7 .
  • the upper edge 11 of the guiding device 4 is located more near to the cell wall 13 than the lower edge 12 .
  • the guiding device is attached to flotation machine 1 by at least one fastening element like bolt.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biotechnology (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Paper (AREA)
  • Physical Water Treatments (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US10/293,413 2003-01-02 2003-01-02 Guiding device for a flotation machine Expired - Fee Related US6832690B2 (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
US10/293,413 US6832690B2 (en) 2003-01-02 2003-01-02 Guiding device for a flotation machine
GB0510427A GB2410453B (en) 2003-01-02 2003-11-07 Guiding device for a flotation machine
CNB2003801050031A CN1313212C (zh) 2003-01-02 2003-11-07 浮选机引导装置
PCT/FI2003/000842 WO2004060565A1 (fr) 2003-01-02 2003-11-07 Dispositif de guidage pour machine de flottaison
MXPA05007280A MXPA05007280A (es) 2003-01-02 2003-11-07 Dispositivo guia para una maquina de flotacion.
BRPI0317899-4B1A BR0317899B1 (pt) 2003-01-02 2003-11-07 máquina de flotação
AU2003276309A AU2003276309B2 (en) 2003-01-02 2003-11-07 Guiding device for a flotation machine
CA2512135A CA2512135C (fr) 2003-01-02 2003-11-07 Dispositif de guidage pour machine de flottaison
EA200500685A EA007279B1 (ru) 2003-01-02 2003-11-07 Направляющее устройство для флотационной машины
ARP030104160A AR042028A1 (es) 2003-01-02 2003-11-12 Guia para maquina de flotacion
SE0501222A SE528208C2 (sv) 2003-01-02 2005-05-31 Anordning vid flotationsmaskin
ZA200504796A ZA200504796B (en) 2003-01-02 2005-06-13 Guiding device for a flotation machine.
FI20050693A FI121263B (fi) 2003-01-02 2005-06-30 Vaahdotuskoneen ohjausjärjestelmä

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/293,413 US6832690B2 (en) 2003-01-02 2003-01-02 Guiding device for a flotation machine

Publications (2)

Publication Number Publication Date
US20040129621A1 US20040129621A1 (en) 2004-07-08
US6832690B2 true US6832690B2 (en) 2004-12-21

Family

ID=32680662

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/293,413 Expired - Fee Related US6832690B2 (en) 2003-01-02 2003-01-02 Guiding device for a flotation machine

Country Status (13)

Country Link
US (1) US6832690B2 (fr)
CN (1) CN1313212C (fr)
AR (1) AR042028A1 (fr)
AU (1) AU2003276309B2 (fr)
BR (1) BR0317899B1 (fr)
CA (1) CA2512135C (fr)
EA (1) EA007279B1 (fr)
FI (1) FI121263B (fr)
GB (1) GB2410453B (fr)
MX (1) MXPA05007280A (fr)
SE (1) SE528208C2 (fr)
WO (1) WO2004060565A1 (fr)
ZA (1) ZA200504796B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100167339A1 (en) * 2007-06-19 2010-07-01 Eastman Chemical Company Process for microalgae conditioning and concentration
US9981209B2 (en) 2015-03-19 2018-05-29 Paterson & Cooke Ideas, Ltd. Thickener feed distributor

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101541434B (zh) * 2007-11-09 2012-11-07 奥图泰有限公司 浮选机转子、形成转子的方法和维修转子的方法
US8276761B2 (en) * 2008-09-05 2012-10-02 Outotec Oyj Froth flotation method and apparatus, a froth flotation method and apparatus for extracting bitumen from a slurry of water and oil sand, and use of the apparatus
WO2012167592A1 (fr) * 2011-06-10 2012-12-13 福建省龙岩龙能粉煤灰综合利用有限公司 Procédé de flottation de cendres de charbon et équipement de flottation
FI20136049L (fi) * 2013-10-25 2015-04-26 Outotec Finland Oy Staattori vaahtoflotaatiota varten
CN106006813B (zh) * 2016-07-06 2019-02-05 中国水产科学研究院渔业机械仪器研究所 一种箱型转子碎气式气浮装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU297395A1 (ru) * Механическая флотационная машина
US1268630A (en) * 1917-05-31 1918-06-04 Joseph P Ruth Jr Aerating device.
US2304270A (en) * 1940-03-08 1942-12-08 American Cyanamid Co Flotation apparatus
US2765078A (en) * 1950-11-25 1956-10-02 Combined Metals Reduction Comp Froth flotation machine with liquid level control weir
CA732254A (en) * 1966-04-12 Nakamura Koichi Method and apparatus for flotation
US3700103A (en) * 1969-07-17 1972-10-24 Walter C Giebel Recovery of minerals

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US269097A (en) * 1882-12-12 Latch
US1891776A (en) * 1930-06-14 1932-12-20 Louis J O'malley Selective separation of ores
US2609097A (en) * 1949-05-12 1952-09-02 Combined Metals Reduction Comp Flotation machine
US3722679A (en) * 1970-09-24 1973-03-27 L Logue Method and means for froth flotation concentration utilizing an aerator having a venturi passage
US3972815A (en) * 1975-01-09 1976-08-03 United States Filter Corporation Mixing apparatus
SU751435A1 (ru) * 1977-09-21 1980-07-30 Украинский Научно-Исследовательский Углехимический Институт "Ухин" Флотационна машина
US4800017A (en) * 1987-04-16 1989-01-24 Dorr-Oliver Incorporated Flotation mechanism
FI107782B (fi) * 1999-12-14 2001-10-15 Outokumpu Oy Vaahdotuskone ja menetelmä vaahdotuksen tehostamiseksi

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU297395A1 (ru) * Механическая флотационная машина
CA732254A (en) * 1966-04-12 Nakamura Koichi Method and apparatus for flotation
US1268630A (en) * 1917-05-31 1918-06-04 Joseph P Ruth Jr Aerating device.
US2304270A (en) * 1940-03-08 1942-12-08 American Cyanamid Co Flotation apparatus
US2765078A (en) * 1950-11-25 1956-10-02 Combined Metals Reduction Comp Froth flotation machine with liquid level control weir
US3700103A (en) * 1969-07-17 1972-10-24 Walter C Giebel Recovery of minerals

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100167339A1 (en) * 2007-06-19 2010-07-01 Eastman Chemical Company Process for microalgae conditioning and concentration
US20100176062A1 (en) * 2007-06-19 2010-07-15 Eastman Chemical Company Process and apparatus for adsorptive bubble separation using a dense foam
US20100181234A1 (en) * 2007-06-19 2010-07-22 Eastman Chemical Company Process and apparatus for adsorptive bubble separation
US8196750B2 (en) 2007-06-19 2012-06-12 Renewable Algal Energy, Llc Process and apparatus for adsorptive bubble separation using a dense foam
US8251228B2 (en) 2007-06-19 2012-08-28 Renewable Algal Energy, Llc Process and apparatus for adsorptive bubble separation
US8512998B2 (en) 2007-06-19 2013-08-20 Renewable Algal Energy, Llc Process for microalgae conditioning and concentration
US9358553B2 (en) 2007-06-19 2016-06-07 Renewable Algal Energy, Llc Process for microalgae conditioning and concentration
EP3138818A1 (fr) 2007-06-19 2017-03-08 Renewable Algal Energy, LLC Procédé et appareil pour séparation de bulles adsorbantes
US9981209B2 (en) 2015-03-19 2018-05-29 Paterson & Cooke Ideas, Ltd. Thickener feed distributor
US10596491B2 (en) 2015-03-19 2020-03-24 Paterson & Cooke Ideas, Ltd. Thickener feed distributor
US11065562B2 (en) 2015-03-19 2021-07-20 Paterson & Cooke Ideas, Ltd. Thickener feed distributor
US11612836B2 (en) 2015-03-19 2023-03-28 Paterson & Cooke Ideas, Ltd. Thickener feed distributor

Also Published As

Publication number Publication date
BR0317899A (pt) 2005-12-06
ZA200504796B (en) 2006-02-22
US20040129621A1 (en) 2004-07-08
FI20050693A (fi) 2005-06-30
BR0317899B1 (pt) 2013-07-16
CA2512135C (fr) 2012-01-03
SE528208C2 (sv) 2006-09-26
GB2410453A (en) 2005-08-03
CA2512135A1 (fr) 2004-07-22
AR042028A1 (es) 2005-06-08
AU2003276309B2 (en) 2009-06-18
WO2004060565A1 (fr) 2004-07-22
GB0510427D0 (en) 2005-06-29
CN1313212C (zh) 2007-05-02
MXPA05007280A (es) 2005-09-08
EA007279B1 (ru) 2006-08-25
GB2410453B (en) 2007-11-14
AU2003276309A1 (en) 2004-07-29
FI121263B (fi) 2010-09-15
EA200500685A1 (ru) 2005-12-29
SE0501222L (sv) 2005-05-31
CN1720104A (zh) 2006-01-11

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